I’m looking at 2015 Denali with 77k on it. The truck is not for sale at a GM dealership. Just curious if the 5/100k warranty transfers to me when I take possession. I won’t have the money to delete it right away. And I don’t have an extra 10k sitting around to replace the fuel system. I’ve heard the horror stories of the cp4 and emissions systems, and quite frankly they have me a bit nervous. I have an 03 lb7 now so the emission stuff is all new to me. Thanks
2015 warranty
- Thread starter Dave69
- Start date
107k miles on stock cp4.2.(bought truck new with 700 miles on it) Full delete. No codes. No problems. Desired and Actual RP are ideal. I use additives in the fuel as its humid here. Filters drained daily to release any water. I havent had any problems with the cp4 but do plan on making the cp3 swap in the future.
My truck has 72k on it. Bone stock other than a Fass 150 Cp4 is doing fine so far. I wont be going with a CP3 though once warranty is up due to hearing about surging issues. Exergy makes a screen that i will probably use. Hoping to hear some more real world trials with it though.
Cp4 failures can be hit or miss. Clean fuel is key, you're pretty much guaranteed issues if you get a tank of water. Don't count on GM to warranty a fuel system either. They'll try to find a way to get out of covering it. There are arguments that a lift pump may help but no real proof. Certainly won't hurt (the truck, could void warranty though) Pretty much just luck of the draw. It may go 400k miles, it may not make 100k. All in the fun of a cp4.
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I agree, I drove a cp3 swapped 15, it was like an lbz with a bad FPR. No thank you! I've looked into the energy cp4 pump, if I keep it, I will swap that pump in to it...
I agree, I drove a cp3 swapped 15, it was like an lbz with a bad FPR. No thank you! I've looked into the energy cp4 pump, if I keep it, I will swap that pump in to it...
It's all in the tuning, it takes several test tunes to get it right no tuner can have it right on the first try it's physically impossible
If you are driving on a cp4 you are literally playing Russian roulette with your truck, just let that sink in
Don't worry much, I have only personally seen one cp4 grenade. Just buy your fuel from a known good source...
